On the necessity of having multiple models in your code base

You cannot under any circumstances have a single model that does everything for you and does it well. It doesn't exist!

-Greg Young https://www.youtube.com/watch?v=JHGkaShoyNs

User stories and use-cases are terms that mean the same thing

And nobody quite understood that there's no difference between a use-case and a user story: they're the same thing.

 The Principles of Clean Architecture by Uncle Bob Martin

CPU Transistor Usage

The trick to cache design is finding an algorithm that gets key information into L1 cache when it's needed. This is so important to performance that more than half of a processor's transistors may be used for a large on-chip cache.

https://www.computerworld.com/article/2584352/computer-hardware/inside-a-microprocessor.html

Diodes vs Transistors

Since all diodes having only two terminal means no controlling action possible whereas Transistors (BJT, FET’s e.t.c) have three terminal.Thus configuration of transistors allows for controlling action due to presence of controlling terminal (i.e for BJT ‘Z’ is Base and for FET’s ‘Z’ is Gate terminal).

http://qr.ae/TUTsSg